Too much torque definitely can warp rotors. Each auto and rotor manufacturer combination has it's own level of sensitivity to this problem. One example at the top of the list is the Mistubishi Diamante. Especially the early models. If front wheel lugs were torqued to anything over 80 ft lbs, after about 2-5 thousand miles, the rotors would warp like clockwork. But these were rotors that were sandwiched between the hub and the wheel assy. This is not the case with the DMC-12. Overtorquing on the DMC-12 would first have to physically warp the hub assy to transfer the stress to the rotor itself. Not probable under most circumstances.